Hedy Lamarr
which machine about 200 years ago charles babbage of britain made a machine which formed the foundation for the modern electronic computers
Electronic music came to be after the invention of the electronic synthesizer in the 1970s.
The electronic calculator.
Electronic music started with the invention of the electronic synthesizer in the 1970s.
Vacuum tube.
cpu
Electronic communication
it is now electronic
Advent of electronic communication
The answer can vary. if your invention is electronic, try Maplin (UK) or RadioShack (US), and possibly eBay (WorldWide).
it didn't impact classical music at all.
Most likely the Silicon Chip.